Loom shuttle



Aug- 24, 1943- c. D. BROWN 2,327,840

Loom SHUTTLE y Filed Aug. 8, 1941 j F/ I E lo /Z J 6 f8 f ,a i* F' Ff 4 Ffa. 4.

- INVENTOR. CARL. D. ./SRo'w/v. l [4 BY M M Ame/ver Patente'd Aug. 24, 1943 1Draper vGimporaltion, "-Hopedle, .Mass., a corv 4 ,poration-.offMaine y npelicationfnugustfe. 1941.215enenNtfcntwm .5 claims.- (otite-1212i vf'Shiittles -o'f fthe Ytype `to Whichfmy invention pertains lcomrmin'ly -co'mp'rise a )shuttle body adaptedto-carryasupplypf llingthiead,thr'ead delivery ime'ans "for delivering bij paying :out the' running filling thread fvvhen fthe shuttle fis in operation in `the loom, 'fand l'a tension device Tor maintaining af predeterminedtension'ontherunning l'iiiling Ethread.Y "Such tension devices "commorilfyi comprise atleastorie 9tension"member engaping "the running filling jflthi'ead "and movable transversely fthereo'f to `t'erisiiori the same, .'such member 'being yieldinglyu'rged L against "the runiiingfillingfthread by aspring such as a "coiled spring ora rdbberfb'and.`

` Priortension devices'off 'the type mentionedcare subjectlto'numer'ous disadvantages;'inludingthe possibility Vof -collapse 'on-breakage of "the 'Very delicate springr or the rubber bandfthefirripo'ssibility o'f providing asingle spring 'siitable for or adjustable to "accommodate VallT'kinds and 'sizes "of illingfthread`,"'the difiiculty 'of accurately ackust-4 ing spring tensin 1*to provide the. desired A"tension on the l"iilling fthreadfand 'the 'non-Furiiform tension provided bysuch spring pr rubber band fand resulting from '-ir'iertiaV "or *vibration "or other causes.

A principal object' dfv the*presentinventionsto provide a shuttle lcarrying a --s'iu1`-r`lyof "llirrg thread a'nd Lhaving thread delivery 'means and tension "devices including a movable `*tensiori member-ias aforesaidlan'd '-irriprovedimeans 'cern-1-V prisingalm'agnet for'yi'ldinly urgingsuch .ten-

sion member into tensioning Lengagement with the running 'flling l-threa, ztherebyilinlinating the `aforesaid disadvantages 'o'f 'prior "construce, tions. Y Y Y f The :foregoing land (otherl 'kiietsif 'the 'in've'zntion fare accomplishedin theic'ristructic illustrated :on the accompanying fdrawing, of Vvwhich:

.-Eig..1-is aplaniviewof'the .threadfdeliveryand of a Kshuttle comprising the preferred embodiment, of my "invention Y Veliifg. 2 .is :a view of ithe .fsame iin :section taken approximately 1 on i-line :2%2 :o'f litg; '11s; Fig. 3,is viewgpartlydn rplan fandip'ar'tly fin sec-` tion approximately on :line ft-S fof IFig'. 2,bu'tto a larger scale; and f mately as indicated by linefi-zivcf'lig. l

The Vparticular;shuttle ishovtnmn the drawing comprises a shuttle body flfof .usual con'structicn except 1'as A modified to accommodate A`the tension adjusting `means hereinafter described. The shuttle zrbody EI =a -jcavity f2 for receiving a supply-of filling "thread which 'may-be carried bybbbinfandiheld inthel shuttle by suitable usualime'ans notishown,-all-V a's fis usual in shuttles 'fftn'istype.

"The shuttle also hasthread deliverymeans of any'suitble`typesuch asaithreading block 5 Whicwmaybe'made of any appropriate non-magnetic'inaterial, such as brass, and side ldelivery ye. 'Thethrea'ding block has front and rear 'Walls "1 fandfil respectively, forming .a' thread passage i9 'extending 'longitudinally of the shuttle. 'hejrunning filling @threadF extends from the bpibini"throughtheithreadpassage`9 and thence oiit'the'sidedeliveryteyei6.

"Thepiai'li'cular*sl'nittle shown being for an au,- toinattic bobbin changing loom, 'the threading bloekinayinelude ahorn IO an'dguardil o'f usual cons'tructon *for automatically .threading tire iillin`g*thread`FdoWn intoits normalrunning pos'ition'intheithreadmassage.9"and eye 6.' i Urrd'er'cetainoperating conditions, and with cetaintyp'esf 'filiingthread, particularlymayon andthe like, the friction'df the 'fixed surfaces .of thethread delivery means isno't sufficient .to maintainfproper tension on "the running `lling tirrea'd.v In'suchcases, a tension device for exerting Aadditi'o'r1eil tension on tlierunning filling thread "isprovided arious constructions` of tension devices have`..beenused for this purpose, 'suchlidevicesincludingatleast onetension memb er movable into engagement with .the running llingthr'efadifcritensioning the same. One form cfsuhfineniber'fis S'hovvniat |52 on'the drawing.

Y'Thefpetrticiiar tensionm'ember f2 is a friction member "or fpad fadaptei'to, be yieldingly pressed againstthe'runing lining thread F Vto thereby tifit'itionally tension the latten Preferably, the

I pad '12 fpresses the fthreaar against a friction of device." Y

'Bheipatieiilarffriction*pads T2 and I3 comprise @alpair dfi opposed -pads 1W1'i`ic'hfar`e positioned that-'except as othervviseicontrlled, .thepads i2' and i I 3`fa i'efree ito move transversely of the s'jhuttle and thread passage and also toward and away from each other. When the running lling thread F' is threaded into the shuttle it is posii tioned between the pads I2 and I3 and will be frictionally tensioned when such pads are pressed together.

The present invention contemplates using a magnet to yieldingly urge a movable tension member againstorV into tensioning engagement with the running filling thread. In the particular embodiment shown, a magnet I5 is constructed and arranged to yieldingly urge the pads I2 and I 3 together.

instance pad I2, and suchpad' is accordingly so constructed that it has the property of being attracted by a magnet. This property may be Ihis magnet I 5.may,v act directly on at least oneof the pads, in this i with lling thread having knots, slubs, orl of. varying diameter. When a knot or thick portion of the thread engages the tensioning member,

g ment of my invention, I claim:

imparted to the pad simply by constructing the pad of a suitable ferrous metal. I3, may also be constructed of ferrous metal, but this is not of consequence in, the particular embodiment shown.. l I i The magnet I5 may be of a-conventional modied horseshoe shape as shown, and is :preferably of a type having a .very strong magnetic iield. The @magnet is positioned yback of the, thread passage 9 and pads I2 and I3, with its rpoles extending toward the pads in alignmenttherewith. To thisend, the shuttle body I may be recessed as shown on Fig. 3 and the back wall 8 of the threading block 5 may be recessed as shown atY I6 and fI'I on Fig...4, `to support the magnet in the back wall of .the threading block.

The pads I2 and I3 beinglwithin the magnetic field of the magnet I5, they will be attracted rearwardly toward the magnet. TheV construction includes stop means for limiting rearward movement of the pad I3 toward thermagnet. As shown, such stop means may consist of the top part I8 and the bottom part I3 4of`tlfieba'ck Wall-8, which parts are` positioned between the magnet I5 and pad I3l and vdirectly engage the latter. Rearward movement of the pad I3 being thus limited, the pad I2 will be attracted or pressed. against the pad I3, or against the running illing thread F when the latter is located between the pads. i

It will be apparent that the force exerted by the magnet I5 on the pad I2 will vary with the distance between `the magnet and pads. The present invention. contemplates providing for adjustment' of` the tension of the. lling .thread by adjusting the position ofv the vmagnet relative to the tensioning member. Y l .l l A spring 2Q anda threaded member vsuohas screwv 2l constitute a simple and effective adjusting means for the purpose above.` described. This spring Zilis a coiled compression spring supported in a hole in the backwall 8 ,of y*the threading block as shown by Figs. 3 and 4; One end of the spring bearsagainst the bottomof said hole and the other end bears against the magnet I5, whereby the springyieldinglyurges the magnet rearwardly. The screw 2I is threaded into an apertureV 22 vin the shuttle block' I and bears against the back of themagnet I5. Turning the screw 2| forwardly will move ythe magnet i5 forwardly against the action'of spring 2l! and thereby increase the force exerted by the magnet on the pad I2.

It will be apparent that the embodiment shown and above described eliminates all of the aforesaid'disadvantages of prior constructions; In addition, the magnetic control is found to be much superior.y to prior constructionshgwhen vused The other pad, 204

1. A loom shuttle comprising a shuttle body adapted to carry a supply of lling thread, thread vdelivery means providing a path for the running lling thread, cooperating tension memfbers engaging the running lling in said path,

at least one of said members being movable to thereby' cause said members to tension said running filling threada normally stationary magnet separate from said-members and constructed and arranged to yieldinglyvmove-said movable member as aforesaid, a stop means for maintainingsaid members in spaced apartrelationshipwith said magnet, and means to adjust the position of said magnet to control the eifect thereof on said movable member.

2. lA loom shuttle comprising a shuttle body adapted to. carry a supply of filling thread, thread delivery means including a longitudinal thread passage for the running filling thread, tension means insaid thread passage comprising a pair of opposed movable friction `pads adapted to grip said running filling threadto thereby tension the same, at least one of said pads having the property of being attractedby a'magnet, a magnet adjustably positioned toakt.-l

tract the last said pad toward the other said pad for the purpose described, and a stop vmeans for limiting the movement of saidpads in the V direction of said Y, magnet.

3. A shuttle for automatic bobbinchanging looms, said,v shuttle including a threading block having allongitudinal thread passage forV the running filling thread, a pair of opposed friction pads vpositioned in said thread passage on oppositesides vthereof and adapted to grip said lling thread `to thereby tension the same, at least one of said pads having the property of being attracted by a magnet, a magnet carried by.v said` threading block and located Aadjacent said pads in position to attract said magnetic pad againstthe .other ofsaid pads, and a stop engaging said other pad for limiting movement of theflatter in the direction of theV force exerted by said magnet.

i4. A-shuttle for automatic bobbin changing looms, said shuttle including a threadingblock having a longitudinal thread passage for the running filling thread, a pair of opposed fric-I tion padsmounted in said thread passage 'for movement transversely thereof, said pads being adapted to frictionally grip said lling thread to therebyV tension the same, said `pads being formed of a ferrous metal', amagnet carried by said-threading block at one side of said pads in position to attract both of said'pads transversely of said thread passage, and a stop located betweensaid magnet and said pads in position to limit movement of the latter toward said magnet, whereby said `pads are l gether by said magnet.

5;A 100m shuttle comprising a shuttle boy adapted. to carry ay supply-'of filling threadya' yieldingly urged Ato-A filling thread, and means for adjusting said magnet toward and away from said member to thereby vary the force exerted by said magnet on said member, said means comprising a spring yeldngly urging said member in one direction and a threaded device for positively moving said magnet in the other direction against the action of said spring.

CARL D. BROWN. 

